Caption: Knee replacement and tibial pin, X-ray. This side view of the right lower leg and knee shows artificial implants (white) holding together the bones of the leg. Severe fractures of the tibia (one of the lower leg bones), and extensive damage to the knee, were treated by a total knee replacement (top) and a pin extending deep into the tibia. The fracture in the tibia is at centre. The other lower leg bone (the fibula) is partially seen at right, and the metal staples used to close the surgical wound are at centre left.